3131 Heating Controllers RMH760 - Xref

3

131

PRELIMINARY EDITION 14.01.2003

Synco™700

Heating Controllers

RMH760

• Heating controller for medium-size and large buildings. The RMH760… is used as a heating circuit or primary controller. The controller is supplied with 28 preprogrammed heating plants • Boiler temperature control, control of a second heating circuit and DHW heating with option modules • Menu-driven operation with separate operator unit (plug-in type or detached) Use Buildings

• • • • • •

Office and administrative buildings Commercial buildings and shops Schools Hospitals Industrial buildings and workshops Apartment blocks and terraced houses

Plants

• • • • •

Heating sections of ventilation and air conditioning plants Distribution zones of ventilation and air conditioning plants Heating systems with own heat source Heating zones of a larger plant Basic load heating systems

CE1N3131en 14.01.2003

Siemens Building Technologies HVAC Products

Functions Note

Several of the functions listed require option modules.

Room operating modes

Room operating modes are: • AUTO: Automatic changeover between 3 setpoints according to the time program • Comfort: Continuously heating to the Comfort setpoint • Precomfort: Continuously heating to the Precomfort setpoint • Economy: Continuously heating to the Economy setpoint • Protective mode: Heating to the setpoint of Protective mode, if necessary

Clock functions

• Year clock with automatic summer-/wintertime changeover • 7-day clock for time program with a maximum of 6 switching points per day, for 1 or 2 heating circuits

Holiday functions

• • • •

Ready configured inputs

2 ready configured inputs for: • Flow temperature (averaging possible) • Outside temperature

Freely configurable inputs

3 freely configurable inputs, optionally for: • Reception of the following measuring signals: − Room temperature (averaging possible) − Return temperature − Wind speed − Intensity of solar radiation • Connection of a remote setpoint adjuster with relative or absolute room setpoint adjustment • Connection of an external switch for: − Operating mode changeover − Timer function − Changeover to holiday mode − Changeover to special day − Indication of faults

Note

If more than 3 configurable inputs are required, option modules must be used.

Remote operation

Remote operation with multifunctional room unit via Konnex bus

Control functions

• Heating circuit controller − Weather-compensated flow temperature control via the heating circuit mixing valve, with adjustable setpoints of Comfort, Precomfort, Economy and Protective mode − Adjustable influence of room temperature, solar radiation and wind − Optimized setback and heating up − Boost heating and quick setback − Automatic heating limit for demand-dependent control of the heating with adjustable heating limits for the Comfort and Economy modes − Automatic changeover to summer operation (heating off) − Room model for room functions without room sensor

Holiday and special day program with 16 periods per year Selectable room operating mode for the holiday periods Selectable DHW operating mode for the holiday periods Time program for special days

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Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

• Primary controller Demand-dependent precontrol via the mixing valve in the common flow, based on the received heat demand signals Limitation functions

• • • •

Maximum limitation of the room temperature Minimum and maximum limitation of the flow temperature Minimum or maximum limitation of the return temperature Limitation of the rate of flow temperature increase

Switching functions

• • • • •

Control of an actuator with 3-position or DC 0...10 V control Pump control (system or heating circuit pump) Control of maximum 2 twin pumps Indication of heat demand Configurable relays

Supervisory and protective functions

• • • • • • •

Mixing valve overrun, mixing valve kick Pump overrun, pump kick Outside temperature-dependent frost protection for the plant Frost protection for the building Overload supervision Fault relay Handling of status and error messages

Service functions

• • • •

Password protection for the configuration Outside temperature simulation Wiring test Storage and reset of parameter sets

Boiler functions (requiring boiler module RMZ781)

• Demand-dependent boiler temperature control • Boiler pump control • Control of a 1- or 2-stage or modulating burner

Second heating circuit (requiring heating circuit module RMZ782)

• Control of a second heating circuit • Maintained boiler return temperature with own mixing circuit • Control of an actuator with 3-position or DC 0...10 V control

DHW functions (requiring DHW module RMZ783)

• • • •

Note

For a more detailed description of all controller functions, refer to Basic Documentation CE1P3131en.

Storage tank charging with charging pump, with or without mixing valve control Storage tank charging via internal or external heat exchanger Time programs for DHW heating and the circulating pump Operating modes: AUTO, continuously Normal, continuously Reduced, Protective mode

Type summary Heating controller

Type of unit Heating controller (de, fr, it) Heating controller (en, fr, nl, es) Heating controller (sv, fi, no, da) Heating controller (pl, cs, sk, hu)

Type reference RMH760-1 RMH760-2 RMH760-3 RMH760-4

Data Sheet CE1N3131en CE1N3131en CE1N3131en CE1N3131en

3/15 Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

Operator/service units

Operator unit, plug-in type Operator unit, detached Servicetool

RMZ790 RMZ791 OCI700.1

CE1N3111en CE1N3112en CE1N5655en

Option modules

Boiler module Heating circuit module DHW module Twin pump module Universal module with 4 universal inputs and 4 relay outputs Universal module with 4 universal inputs and 2 analog and 2 relay outputs Module connector for detached option modules

RMZ781 RMZ782 RMZ783 RMZ786

CE1N3135en CE1N3135en CE1N3135en CE1N3145en

RMZ787

CE1N3146en

RMZ788 RMZ780

CE1N3147en CE1N3138en

Ordering When ordering, please give type reference according to the above table. The required operator unit and option modules must be ordered as separate items. Room units, sensors, actuator and valve must also be ordered separately. Equipment combinations Suitable sensors

Type of sensor

Suitable remote setpoint adjusters

Suitable actuators

Type reference Data Sheet QAC22 QAC32 QAD22 QAE2… QAE21.3 QAA24 QAA64 QVV60 QLS60

CE1N1811E CE1N1811E CE1N1801E CE1N1791E CE1N1832E CM1N1721E CM1N1722E CM1N19XXE CM1N1943E

Type of room unit Room temperature sensor with setpoint adjuster Room temperature sensor with setpoint readjuster Room unit with Konnex interface

Type reference QAA25 QAA27 QAW740

Data Sheet CM1N1721E CM1N1721E CE1N1633en

Type of remote setpoint adjuster Remote setpoint adjuster, signal 0...1000 Ω Remote setpoint readjuster, ±3 K

Type reference Data Sheet BSG21.1 CE1NXXXXen BSG21.5 CA1NXXXXen

Outside sensor Outside sensor Strap-on temperature sensor Immersion temperature sensor Immersion temperature sensor Room temperature sensor Room temperature sensor Wind effect sensor Solar impact sensor Suitable room units

Type of sensing element, Signal LG-Ni 1000 NTC 575 LG-Ni 1000 LG-Ni 1000 LG-Ni 1000 LG-Ni 1000 LG-Ni 1000 DC 0...10 V DC 0...10 V

All types of electromotoric and electrohydraulic actuators from SBT HVAC Products can be used: • Operating on AC 24…230 V • 3-position control • DC 0...10 V modulating control For detailed information about actuators and valves, refer to Data Sheets CE1N4000E…4999E.

4/15 Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

Product documentation Type of document

Number

Product Range Description

CE1N3146en

Basic Documentation

CE1P3130en

Installation instructions

7431903390

Operating Instructions (de, fr, it)

7431903450

Declaration of Conformity (CE)

CE1T3100en

Environmental Declaration

CE1E3100en

Technical design

Precontrol can only be provided by the controller. There are 2 choices: With mixing valves: With system pump: P1 P2 Y1

3131S02

Use of individual devices Precontrol

The controller is supplied with 28 basic types of heating plant preprogrammed. They have been selected to cover the majority of standard applications. Some of them require option modules. When commissioning a plant, the relevant basic plant type must be entered. All associated functions, terminal assignments, settings and displays will automatically be activated, and parameters not required will be deactivated.

3131S01

Mode of operation

M1

M1 B1 B7

B1*

B7*

B1 Flow temperature sensor B1* Flow temperature sensor (optioanal, for display only) B7 Return temperature sensor (optional, for minimum limitation) B7* Return temperature sensor (optional, for maximum limitation) M1 System pump (can be a twin pump) Y1 Mixing valve

Measuring input B7 for the return temperature can be configured for either minimum or maximum limitation. The control of 1 or 2 heating circuits can be provided either by the controller or the RMZ782 heating circuit module. The available choices are the same with both types of unit, provided the required connection terminals are present or can be configured. Please also note the following: • If the controller and heating circuit module do not have a sufficient number of configurable connection terminals, an additional option module can be used • If the controller is used as a primary controller, the RMZ782 heating circuit module must be used for the control of the heating circuit • A second heating circuit must be controlled with the RMZ782 heating circuit module • Measuring input B7 for the return temperature can be configured for either minimum or maximum limitation B5 R5 A5 B9 B91 B92 B1 M1

B7*

Y1 B7

3131S39

Heating circuit control

A5 B1 B5 B7 B7* B9 B91 B92 M1 R5 Y1

Room unit (optional) Flow temperature sensor Room temperature sensor (optional) Return temperature sensor (optional, for minimum limitation) Return temperature sensor (optional, for maximum limitation) Outside sensor Solar impact sensor (optional) Wind effect sensor (optional) Heating circuit pump (can be a twin pump) Remote setpoint adjuster (optional) Mixing valve 5/15

Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

Boiler temperature control requires the RMZ781 boiler module. There are 2 choices: Boiler pump in the flow: Boiler pump in the bypass: G2 3131S03

G1 B2

3131S04

Boiler temperature control

B2

M1 B7

B7

Maintained boiler return temperature

B2 B7

Boiler temperature sensor Return temperature sensor (optional, for minimum limitation) M1 System or bypass pump (E1: can be a twin pump)

M1

In plants with maintained boiler return temperature, the following types of modules are required, in addition to the controller: • Heating circuit module RMZ782; it controls the boiler return temperature via a mixing valve, depending on the temperature acquired with B1. The module also controls boiler pump M1 • Boiler module RMZ781; this module controls the boiler temperature depending on the temperature acquired with B2, and also controls system pump M2 One of the basic types 4–... must be selected on the controller.

B2

3131S41

G3 RMZ781

M2 B1 M1 RMZ782

Y1

Boiler return temperature sensor (controlled variable) Boiler temperature sensor Boiler pump (can be a twin pump) System pump (can be a twin pump) Mixing valve Balancing valve

DHW heating requires the RMZ783 DHW module. There are 5 choices: DHW2 B4

E7

3131S34

DHW1

B3 E7

M4 M3

B4*

B3

B4 E7 M3

B4*

B3*

M4

B3 B4 E7

M5 Y1

3131S37

DHW4 3131S36

DHW3

M4

B4*

Y1

M3

B4

3131S35

DHW heating

B1 B2 M1 M2 Y1 Y2

Y2

M3

M4

B4*

Y2

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Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

B3*

B3

3131S38

DHW5 B4

B3 B3* B4 B4* E7 M3 M4 M5 Y1 Y2

M4

E7 B4*

M5

M3

Charging temperature sensor Primary flow temperature sensor (optional) Storage tank sensor at the top Storage tank sensor at the bottom (optional) Electrical immersion heater (optional) Charging pump (can be a twin pump) Circulating pump (optional) Primary pump (can be a twin pump) Mixing valve 2-port valve

Basic types The illustrations contained in this section use the following symbols for precontrol, boiler temperature control and DHW heating:

RMH760

RMZ782

RMH760

RMZ783

0-5

3131S06

RMH760

0-3

RMH760

RMZ783

0-4

RMZ783

RMH760

RMZ782

With all basic types 1–x, primary controller variants P1 and P2 can be selected. 3131S13

1-3

RMH760

RMZ783

RMZ782

RMH760

RMZ783

3131S14

RMH760

1-2

RMZ782

1-4

3131S12

1-1

3131S11

Basic types 1–x

0-2

DHW heating 3131S08

0-1

3131S07

Basic types 0–x

Boiler temperature control

3131S09

Precontrol

3131S05

Note on illustrations

RMH760

RMZ782

RMZ782

7/15 Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

3131S15

1-5

RMH760

RMZ782

RMZ782

RMH760

2-3

RMZ783

RMZ782

RMH760

RMZ783

RMZ782

RMZ782

RMZ782

RMZ782

2-4

RMH760

2-5

RMZ782

RMH760

3131S23

RMZ781

3-2

RMZ781

3-1

RMH760

RMZ781

RMH760

RMZ783

RMZ781

RMZ783

RMH760

3131S26

3-0

3131S25

With all basic types 3–x, boiler pump variants G1 and G2 can be selected. 3131S22

Basic types 3–x

RMH760

3131S21

RMH760

2-2

RMZ783

3131S20

RMH760

3131S17

2-1

3131S18

2-0

3131S19

With all basic types 2–x, primary controller variants P1 and P2 can be selected. 3131S42

Basic types 2–x

RMZ783

3-3

8/15 Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

RMZ781

RMH760

3131S27

3131S24

3-4

3-5

RMZ782

RMZ781

RMZ783

RMH760

RMZ782

For minimum limitation of the boiler return temperature, basic types 4–x have their own mixing circuit.

RMZ782

RMZ782

4-4

4-3

RMZ781

RMH760

3131S31

RMZ783

RMZ783

RMH760

RMZ782

RMZ781

RMZ782

RMH760

RMZ781

RMZ782

RMH760

RMZ782

4-5

RMZ782

RMH760

RMZ781

RMZ781

3131S33

4-2

4-1

3131S32

RMZ781

3131S30

4-0

3131S28

For minimum limitation of the boiler return temperature, basic types 4–x have their own mixing circuit

3131S29

Basic types 4–x

RMZ783

RMH760

RMZ782

Mechanical design Basic design

The controller consists of terminal base and controller insert. It has a plastic housing with the printed circuit boards, 2 terminal levels and carries the connecting elements (electrical and mechanical) for an option module.

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Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

The controller can be fitted to a top hat rail conforming to EN 60 715-TH35-7.5, or can be mounted directly on a wall. Operation takes place with either a plug-in type or detached operator unit (refer to section "Type summary").

1

2

3

11 3144Z01

Operating, indicating and connecting elements

4 1 2 3 4 5 6 7 8 9 10 11

5

6 7

8

9

5

11

10

Connection facility for the service interface (RJ45 socket) Connection facility for the operator unit (with removable cover) LED (green) for indication of operation Fault button with LED (red) for indication of faults and for resetting Openings for plug-in type operator unit RMZ790 Button for assignment of the device address LED (red) for indication of the programming process Mounting facility for fitting the controller to a top hat rail Fixing facility for a cable tie Electrical and mechanical connection elements for the option module Rest for the terminal cover

Engineering notes • The controller operates on AC 24 V. Operating voltage must conform to the requirements of SELV (safety extra low-voltage) • The transformers used must be safety isolating transformers featuring double insulation to EN 60 742 and EN 61 558-2-6; they must be suited for 100 % duty • Fuses, switches, wiring and earthing must be in compliance with local regulations • The lines of the measuring circuits carry protective low-voltage, those to the 3position actuator and the pumps carry AC 24...230 V • Sensor wires should not be run parallel to mains carrying cables powering fans, actuators, pumps, etc. • The controller can be used with a maximum of 4 option modules • The reference room for control with a room temperature sensor should be the room that cools down quickest. That room may not be equipped with thermostatic radiator valves; manual valves must be locked in their fully open position Mounting and installation notes • Standard mounting location is the control panel. Not permitted are wet or damp spaces. The permissible environmental conditions must be observed • Suitable mounting locations are walls (in rooms or control panels) and front panels • The control panel must be prepared for the proposed operator unit. This applies to both the variant and the outer dimensions • Disconnect the equipment from power supply during mounting and installation • The controller insert may not be removed from the terminal base!

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Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

• If option modules are used, they must be attached to the right side of the controller in the correct order. This means in agreement with ascending type reference numbers: RMH760 – RMZ781 – RMZ782 – RMZ782 – RMZ783 – RMZ786 – RMZ787 – RMZ788. • The option modules require no wiring between one another or to the controller; the electrical connections are made automatically when attaching the modules. If it is not possible to arrange the option modules side by side, the first of the detached modules must be connected to the last previous module or to the controller using the RMZ780 module connector. In that case, the maximum cable length is 10 m • All connection terminals for protective extra low-voltage (sensors and data bus) are located on the upper terminal block, those for mains voltage (actuators and pumps) on the lower terminal block • Each terminal (spring cage terminal) can accommodate only one solid wire or one stranded wire. For making the connections, the cables should be stripped for 7 to 8 mm. To introduce the cables into the spring cage terminals and to remove them, a screw driver size 0 or 1 is required; cable strain relief can be provided with the help of the fixing facility for cable ties • The controller is supplied complete with Installation and Operating Instructions Commissioning notes • The operator unit can be removed and plugged in or connected while the controller is in operation • For commissioning, there are several auxiliary functions available (refer to «Service and operating functions») • Commissioning is carried out with the RMZ79... operator unit or the OCI700.1 service tool Disposal notes Larger plastic parts carry material identifications conforming to ISO/ DIS 11 469 to facilitate environment-compatible disposal. Technical data Operating voltage*

Rated voltage Rated frequency Max. power consumption (without modules) Fusing of supply lines

AC 24 V (±10 %) 50 Hz 12 VA max. 16 A

Functional data

Reserve of clock Software class Mode of operation to EN 60 730

15 h A 1b (automatic operation)

Relay outputs*

Rated voltage range Rated current range Switch-on current Switching capacity as valve actuator relay

AC 24...230 V 0.02…2 (2) A ≤15 A for ≤ 20 ms max. 15 VA

* Nomenclature of electrotechnical variables as per EN 60 730-1

Other inputs and outputs

For definition of all other inputs and outputs, refer to «Connection terminals»

Interfaces

Konnex bus Type of interface Transceiver

Konnex-TP1 TP-UART 11/15

Siemens Building Technologies HVAC Products

Data sheet RMH760

Preliminary Edition 14.01.2003

CE1N3131en 14.01.2003

Baud rate Bus loading number (SBT) Decentral bus power supply, can be switched off Type of cable

Connection of room unit QAW740 Cable Cable length Service tool connection facility

9.6 kBit/s

20 mA 2-core, without shielding, twisted pairs, connections not interchangeable dia. 0.8 mm normally 350 m (>350 m: refer to Konnex document) RJ45 socket

For more information about the Konnex bus, refer to the following pieces of documentation: • Data Sheet CE1N3127en • Basic Documentation CE1P3127en Permissible cable lengths To the sensors Copper cable 0.6 mm dia. Copper cable 1.0 mm2 Copper cable 1.5 mm2 To the room units QAA2... Copper cable 0.6 mm dia. Copper cable 1.0 mm2 Copper cable 1.5 mm2 Degrees of protection

Materials and colors

Permissible ambient conditions

Norms and standards

20 m 50 m 80 m 20 m 50 m 80 m

Degree of protection of housing to EN 60529 Safety class to EN 60730 Degree of contamination to EN 60 730

IP20 (when mounted) corresponding to safety class II if adequately mounted normal contamination

Controllers Packaging

Polycarbonate, RAL 7035 (light-grey) corrugated cardboard

Transport Temperature Humidity Storage Temperature Humidity Operation Temperature Humidity

–25..+70 °C